Year	constant 2011 international $
1990	1614.0115330846
1991	1576.21006642226
1992	1689.2228938725
1993	1769.47038344975
1994	1780.80470961287
1995	1854.86704912626
1996	1967.28496766617
1997	2139.04207716435
1998	2163.76419919605
1999	2147.27587765196
2000	2177.53952075833
2001	2233.35621528442
2002	2325.41533504002
2003	2403.74960887561
2004	2412.18177802943
2005	2548.94859484989
2006	2757.44293498301
2007	2966.92259902131
2008	3117.81014593281
2009	3130.28884304714
2010	3127.61200213627
2011	3493.58691165781
2012	3757.63462407444
2013	2684.58624536728
2014	3772.17152924597
2015	3903.94217500094
2016	3993.62254104959
2017	4091.81655758501
2018	3961.61568277271